From d0470a58599a25a5ecc3127207f784f79122a526 Mon Sep 17 00:00:00 2001
From: "Micael Levi L. Cavalcante" <mllc@icomp.ufam.edu.br>
Date: Wed, 24 Nov 2021 10:07:57 -0400
Subject: [PATCH] fix: handle only one connection socket failure event

Closes #35
---
 src/smtp/smtp.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/smtp/smtp.ts b/src/smtp/smtp.ts
index 1d87c53..773e90d 100644
--- a/src/smtp/smtp.ts
+++ b/src/smtp/smtp.ts
@@ -28,7 +28,7 @@ export const checkSMTP = async (
         socket.emit('fail', 'Mail server closed connection without sending any data.')
       }
     })
-    socket.on('fail', msg => {
+    socket.once('fail', msg => {
       r(createOutput('smtp', msg))
       if (socket.writable && !socket.destroyed) {
         socket.write(`quit\r\n`)